require 'digest/sha1'
class User < ActiveRecord::Base
  # Virtual attribute for the unencrypted password
  has_many :photos
  before_destroy { |record| Photo.destroy_all "user_id = #{record.id}"   }
  has_many :orders
  named_scope :archived, :conditions => {:archived => 'Да'}, :order=> 'fio'
  named_scope :not_archived, :conditions => {:archived => 'Нет'}, :order=> 'fio'
  attr_accessor :password

  validates_presence_of     :login, :message => "Имя не может быть пустым"
  validates_presence_of     :password, :message => "Пароль не может быть пустым",     :if => :password_required?
  validates_presence_of     :password_confirmation,      :if => :password_required?
  validates_length_of       :password, :within => 4..40, :message => "мало букав", :if => :password_required?
  validates_confirmation_of :password, :message => "Введенные пароли не совпадают",                  :if => :password_required?
  validates_length_of       :login,    :within => 3..40, :message => "мало букав"
  validates_uniqueness_of   :login, :case_sensitive => false, :message => "Имя должно быть уникальным"
  before_save :encrypt_password

  # Authenticates a user by their login name and unencrypted password.  Returns the user or nil.
  def self.authenticate(login, password)
    u = find_by_login(login) # need to get the salt
    u && u.authenticated?(password) ? u : nil
  end

  # Encrypts some data with the salt.
  def self.encrypt(password, salt)
    Digest::SHA1.hexdigest("--#{salt}--#{password}--")
  end

  # Encrypts the password with the user salt
  def encrypt(password)
    self.class.encrypt(password, salt)
  end

  def authenticated?(password)
    crypted_password == encrypt(password)
  end

  def remember_token?
    remember_token_expires_at && Time.now.utc < remember_token_expires_at 
  end

  # These create and unset the fields required for remembering users between browser closes
  def remember_me
    self.remember_token_expires_at = 2.weeks.from_now.utc
    self.remember_token            = encrypt("#{email}--#{remember_token_expires_at}")
    save(false)
  end

  def forget_me
    self.remember_token_expires_at = nil
    self.remember_token            = nil
    save(false)
  end

  protected
  # before filter 
  def encrypt_password
    return if password.blank?
    self.salt = Digest::SHA1.hexdigest("--#{Time.now.to_s}--#{login}--") if new_record?
    self.crypted_password = encrypt(password)
  end
    
  def password_required?
    crypted_password.blank? || !password.blank?
  end
end
